CN102583656B - Dielectric barrier discharge water treatment device - Google Patents
Dielectric barrier discharge water treatment device Download PDFInfo
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- CN102583656B CN102583656B CN201210068601.7A CN201210068601A CN102583656B CN 102583656 B CN102583656 B CN 102583656B CN 201210068601 A CN201210068601 A CN 201210068601A CN 102583656 B CN102583656 B CN 102583656B
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Abstract
The invention discloses a dielectric barrier discharge water treatment device, which comprises a high-voltage high-frequency pulse power supply, a tinfoil high-pressure electrode, a quartz medium cylinder, a copper tube grounding electrode, a suspension electrode and an insulating board. The suspension electrode is in a cylinder shape, the inner diameter of the suspension electrode is larger than the outer diameter of the copper tube grounding electrode, and the central axis of the suspension electrode is collinear with that of the copper tube grounding electrode. Water needing to be treated enters the copper tube grounding electrode from a water inlet at the center of the insulating board and overflows from the upper end of the copper tube grounding electrode, a flowing water film forms at the outer wall of the copper tube grounding electrode, and finally the water discharges from a water outlet at the lower end of the quartz medium cylinder. The dielectric barrier discharge water treatment device directly uses sewage as an auxiliary grounding electrode, generated active substances in plasma can be directly mass-transferred into the water, the mass-transferred efficiency is high, and the required time is less. When the dielectric barrier discharge water treatment device is in sewage treatment, the sewage can be treated flexibly, water flow speed can be adjusted, namely sewage can be treated in one step and can be treated circularly and repeatedly, and maneuverability in an actual application process is strong.
Description
Technical field
The invention belongs to low-temperature plasma generation technique and field of water processing technology, relate to the device that a kind of high voltagehigh frequency pulse gas-liquid mixed media barrier discharge plasma is processed waste water.
Background technology
Water resource pollution is one of urgent problem of generally facing of countries in the world, and its degradating trend grows in intensity, make traditional biological chemical treatment method be difficult to solve completely the problems that water pollutes, as microorganism, degraded persistence organic pollutant etc. are removed in denitrogenation dephosphorizing, decolouring and deodorizing, sterilization.
With the high-voltage pulse dielectric barrier discharge plasma of embedded electrode in liquid, process waste water, as one more effectively and administer technology more cheaply, have important practical value.This technology is positioned over block media between electrode, two electrodes are separated, while applying high-voltage pulse between two electrodes, the gas of electrode gap will puncture, produce a large amount of trickle Fast pulsed discharge passages, at electronics, by the process of passage, some excited atoms and molecule can spontaneously be launched uv-radiation.The low-temperature plasma of discharge generation, acts on processed trade effluent and the difficult for biological degradation pollutent in dyeing waste water, has the features such as treatment effect is good, decolouring is rapid, non-secondary pollution.And dielectric barrier discharge has evenly, disperses and stable feature, the electron energy producing in dielectric barrier discharge process is far above the mean electron energy value of corona discharge, spark discharge, can fully make organic molecule, water molecules, oxygen molecule produce ionization, thereby inspire the particle that many activity are higher, C-C key and unsaturated link(age) in these active substances and high-energy electron bombardment pollution substance thereof, there is the series reaction such as scission of link and open loop, make macromole toxic substance become small molecules safe material, and even it is removed the most at last, makes waste water innoxious.Therefore, high-voltage pulse dielectric barrier discharge plasma processing waste water technology is with a wide range of applications.Although have some, dielectric barrier discharge technology is applied to the research of wastewater treatment, but it is in gas, to produce dielectric barrier discharge that conventional high-tension pulsating medium barrier discharge plasma is processed the method for waste water, the plasma gas producing is passed in water and is carried out sewage disposal by mass transfer process, have that mass-transfer efficiency is low, short life material effectively mass transfer, cost high, the problem such as can not process continuously.Therefore develop that a kind of mass-transfer efficiency is high, pollutant removing efficiency is high, cost is low, can processed continuously dielectric barrier discharge water technology and install significant.
Summary of the invention
The problems referred to above that exist for solving prior art, the object of this invention is to provide a kind of mass-transfer efficiency high, can process continuously, pollutant removing efficiency is high, cost is low dielectric barrier discharge water treatment device.
For achieving the above object, technical scheme of the present invention is as follows:
, comprise the high voltagehigh frequency pulse power, tinfoil high voltage electrode, quartz medium cylinder, copper pipe ground-electrode, suspension electrode and insulcrete; Described quartz medium cylinder and insulcrete anabolic reaction device, quartz medium cylinder is that reactor shell, insulcrete are reactor bottom; The lower end of copper pipe ground-electrode is fixed on the insulcrete of reactor bottom, its upper end is connected with the high voltagehigh frequency pulse power by cable; Described suspension electrode is shaped as cylinder, and its internal diameter is greater than the external diameter of copper pipe ground-electrode, the central axis conllinear of its central axis and copper pipe ground-electrode; Described tinfoil high voltage electrode is arranged on the outer side surface of quartz medium cylinder, and is connected with the high voltagehigh frequency pulse power by cable; Described insulcrete center has water-in and is connected with inlet channel; Described quartz medium cylinder has water outlet and is connected with outlet conduit near the position of lower end; The water-in of pending water through insulcrete center enters copper pipe ground-electrode, and overflows from the upper end of copper pipe ground-electrode, at the outer wall of copper pipe ground-electrode, forms mobile moisture film, finally by the water outlet of quartz medium cylinder lower end, discharges.
Lower end and the insulcrete of quartz medium cylinder of the present invention are tightly connected, and lower end and the insulcrete of described copper pipe ground-electrode are tightly connected.
The internal diameter of suspension electrode of the present invention is greater than copper pipe external diameter 0.1-4.0mm.
Distance between quartz medium cylinder inner wall of the present invention and moisture film is 0.1-9.0mm.
Water film thickness of the present invention is 0.1-4.0mm.
The crest voltage of the high voltagehigh frequency pulse power of the present invention is 1-60kV, frequency 1-30kHz.
Suspension electrode of the present invention is netted suspension electrode.
The material of netted suspension electrode of the present invention is insulating material or metallic substance.
The material of copper pipe ground-electrode of the present invention replaces with other metallic substance.
Tinfoil high voltage electrode material of the present invention replaces with other metallic substance.
Ultimate principle of the present invention is as follows: pending waste water is passed in copper pipe ground-electrode pipe by water inlet pipe, waste water overflows from copper pipe ground-electrode outside after being full of copper pipe ground-electrode, in copper pipe ground-electrode outside, form certain thickness mobile moisture film, suspension electrode is installed in moisture film outside.When applying sufficiently high voltage of alternating current on tinfoil high voltage electrode and copper pipe ground-electrode, two interelectrode gases are breakdown and form dielectric barrier discharge, and in discharge process, the existence of suspension electrode can be avoided the stability of the influence of fluctuations dielectric barrier discharge of moisture film.Therefore, this dielectric barrier discharge shows as evenly, disperses and stablize, seemingly hypobaric glow discharge.When waste water dielectric barrier discharge plasma produces, electronics under the effect of extra electric field with gas molecule frequent impact, quick travel is also carried out the mutual transmission of energy.The electronics of high-speed motion and ion expand rapidly electrical discharge zone, finally produce the thread discharge channel of the high conductivity in a permeate discharge space, until waste water water film surface.The Athermal plasma that dielectric barrier discharge produces is distributed in the thread discharge channel in permeate discharge space, can make gas ionize, and produces various living radicals or charged atom and group, as OH, O
3, O, H
2o
2deng, integral body has strong oxidizing property, and directly mass transfer is in waste water moisture film.Meanwhile, not only as medium but also as supplementary ground electrode, can there is electrochemical reaction in waste water moisture film in waste water simultaneously.C-C key and unsaturated link(age) in living radical in reaction process and high-energy electron bombardment pollution substance, there is the series reaction such as scission of link and open loop, make larger molecular organics become small molecules inorganics, and even it is removed the most at last, make pollutant removing in waste water, innoxious.Finally, the waste water after processing is through rising pipe outflow reactor.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention is directly usingd waste water and auxiliary is connect earthing pole as one, and in the plasma body of generation, directly mass transfer is in water for active substance, and mass-transfer efficiency is high, and required time is short.
2, the present invention is using water as supplementary ground electrode, and specific heat capacity is very large, makes the temperature of the system of discharging can be too not high, and water plays cooling effect, can make the heat radiation of electric discharge system evenly, is more conducive to the stability of electric discharge.
3, the present invention adopts the design of suspension electrode, has reduced the drawing force of electric field to water molecules, and water film surface mobile in the time of can making to discharge is steady, electric discharge evenly, the problems such as the shelf depreciation of having avoided liquid to splash causing on block media surface and short circuit.Under identical discharging gap, increase suspension electrode, the crest voltage in the time of can reducing Uniform Discharge and frequency, reduce energy consumption, and the damage that reduces electrode is useless.Same electrical is depressed, and due to water flow stationary, can reduce discharging distance, makes waste water under the identical treatment time, and pollutant removing efficiency improves.
4, the present invention is when processing waste water, and waste water is flowable processed, and flow velocity is adjustable, both can disposable processing waste water, and repeatedly Continuous Wastewater Treatment capable of circulation, workable in actual application again.
5, technique of the present invention is advanced, stable, simple to operate, under atmospheric pressure can move, and equipment is easy to management, has stronger practicality, economy.
Accompanying drawing explanation
The present invention has accompanying drawing 2 width, wherein:
Fig. 1 is dielectric barrier discharge water treatment device schematic diagram.
Fig. 2 is dielectric barrier discharge water treatment device electric discharge schematic diagram.
In figure: 1, the high voltagehigh frequency pulse power, 2, tinfoil high voltage electrode, 3, quartz medium cylinder, 4, copper pipe ground-electrode, 5, suspension electrode, 6, insulcrete.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details: as shown in Figure 1-2,, comprise the high voltagehigh frequency pulse power 1, tinfoil high voltage electrode 2, quartz medium cylinder 3, copper pipe ground-electrode 4, suspension electrode 5 and insulcrete 6; Described quartz medium cylinder 3 and insulcrete 6 anabolic reaction devices, quartz medium cylinder 3 is that reactor shell, insulcrete 6 are reactor bottom; The lower end of copper pipe ground-electrode 4 is fixed on the insulcrete 6 of reactor bottom, its upper end is connected with the high voltagehigh frequency pulse power 1 by cable; Described suspension electrode 5 is shaped as cylinder, and its internal diameter is greater than the external diameter of copper pipe ground-electrode 4, the central axis conllinear of its central axis and copper pipe ground-electrode 4; Described tinfoil high voltage electrode 2 is arranged on the outer side surface of quartz medium cylinder 3, and is connected with the high voltagehigh frequency pulse power 1 by cable; Described insulcrete 6 centers have water-in and are connected with inlet channel; Described quartz medium cylinder 3 has water outlet and is connected with outlet conduit near the position of lower end; Pending water enters copper pipe ground-electrode 4 through the water-in at insulcrete 6 centers, and overflows from the upper end of copper pipe ground-electrode 4, and forms mobile moisture film at the outer wall of copper pipe ground-electrode 4, finally by the water outlet of quartz medium cylinder 3 lower ends, discharges.Lower end and the insulcrete 6 of described quartz medium cylinder 3 are tightly connected, and lower end and the insulcrete 6 of described copper pipe ground-electrode 4 are tightly connected.The internal diameter of described suspension electrode 5 is greater than copper pipe external diameter 0.1-4.0mm.Described quartz medium cylinder 3 inwalls and the distance between moisture film are 0.1-9.0mm.Described water film thickness is 0.1-4.0mm.The crest voltage of the described high voltagehigh frequency pulse power 1 is that the suspension electrode 5 described in 1-60kV, frequency 1-30kHz is netted suspension electrodes 5.The material of described netted suspension electrode 5 is insulating material or metallic substance.The material of described copper pipe ground-electrode 4 replaces with other metallic substance.Described tinfoil high voltage electrode 2 materials replace with other metallic substance.
The present invention is usingd quartz medium cylinder 3 as reactor shell, and internal diameter is 100mm, high 1000mm, thickness of pipe 3mm, and 2mm circular hole, connected water outlet pipe are opened in quartz medium cylinder 3 bottoms.With copper pipe ground-electrode 4, make ground electrode, external diameter 80mm, high 900mm, thickness 2mm.Being greater than copper pipe external diameter 4mm place around settling a circle suspension electrode 5, guarantee that current are even, prevent that spray from splashing on the inwall of quartz medium cylinder 3, causes discharge short.Discharge space is between the inwall and moisture film of quartz medium cylinder 3, and spacing is 5mm.Reactor enclosure is external tinfoil high voltage electrode 4, high 670mm, thick 0.1mm.Reactor bottom is insulcrete 6, and circular hole is opened at insulcrete 6 centers, is installed into water pipe, and control water film thickness is 1-2mm.
Under atmospheric pressure, in reactor, pass into phenolic wastewater, electrical conductivity of solution is 4 μ Scm
-1, discharge frequency 8kHz, crest voltage 20kV, during waste water flow velocity 40mL/min, the decreasing ratio > 80% of phenolic wastewater.The present invention utilizes the high voltagehigh frequency pulse power 1, can under highfield, there is dielectric impedance gas-liquid mixed discharge, in solution, produce the active substance of high density, abundant organic substance in degradation water, solve waste water sterilization and disinfection, decolouring and deodorizing problem, and cost is low, the treatment time is short, energy-saving and emission-reduction.
Claims (10)
1. a dielectric barrier discharge water treatment device, is characterized in that: comprise the high voltagehigh frequency pulse power (1), tinfoil high voltage electrode (2), quartz medium cylinder (3), copper pipe ground-electrode (4), suspension electrode (5) and insulcrete (6); Described quartz medium cylinder (3) and insulcrete (6) anabolic reaction device, quartz medium cylinder (3) is that reactor shell, insulcrete (6) they are reactor bottom; The lower end of copper pipe ground-electrode (4) is fixed on that the insulcrete (6) of reactor bottom is upper, its upper end is connected with the high voltagehigh frequency pulse power (1) by cable; Described suspension electrode (5) is shaped as cylinder, and its internal diameter is greater than the external diameter of copper pipe ground-electrode (4), the central axis conllinear of its central axis and copper pipe ground-electrode (4); Described tinfoil high voltage electrode (2) is arranged on the outer side surface of quartz medium cylinder (3), and is connected with the high voltagehigh frequency pulse power (1) by cable; Described insulcrete (6) center has water-in and is connected with inlet channel; Described quartz medium cylinder (3) has water outlet and is connected with outlet conduit near the position of lower end; Pending water enters copper pipe ground-electrode (4) through the water-in at insulcrete (6) center, and overflow from the upper end of copper pipe ground-electrode (4), outer wall at copper pipe ground-electrode (4) forms mobile moisture film, finally by the water outlet of quartz medium cylinder (3) lower end, discharges.
2. a kind of dielectric barrier discharge water treatment device according to claim 1, it is characterized in that: lower end and the insulcrete (6) of described quartz medium cylinder (3) are tightly connected, lower end and the insulcrete (6) of described copper pipe ground-electrode (4) are tightly connected.
3. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: the internal diameter of described suspension electrode (5) is greater than copper pipe external diameter 0.1-4.0mm.
4. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: described quartz medium cylinder (3) inwall and the distance between moisture film are 0.1-9.0mm.
5. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: described water film thickness is 0.1-4.0mm.
6. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: the crest voltage of the described high voltagehigh frequency pulse power (1) is 1-60kV, frequency 1-30kHz.
7. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: described suspension electrode (5) is netted suspension electrode (5).
8. a kind of dielectric barrier discharge water treatment device according to claim 7, is characterized in that: the material of described netted suspension electrode (5) is insulating material or metallic substance.
9. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: the material of described copper pipe ground-electrode (4) replaces with other metallic substance.
10. a kind of dielectric barrier discharge water treatment device according to claim 1, is characterized in that: described tinfoil high voltage electrode (2) material replaces with other metallic substance.
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| CN201210068601.7A CN102583656B (en) | 2012-03-15 | 2012-03-15 | Dielectric barrier discharge water treatment device |
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| CN201210068601.7A CN102583656B (en) | 2012-03-15 | 2012-03-15 | Dielectric barrier discharge water treatment device |
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| CN102583656B true CN102583656B (en) | 2014-02-05 |
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| CN115353174B (en) * | 2022-08-23 | 2023-11-21 | 天泓环境科技有限责任公司 | Plasma active water generating device and active water generating method |
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| JP3303389B2 (en) * | 1993-01-20 | 2002-07-22 | ウシオ電機株式会社 | Processing method using dielectric barrier discharge lamp |
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| CN202542934U (en) * | 2012-03-15 | 2012-11-21 | 大连海事大学 | Dielectric barrier discharge water treatment device |
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